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100 Threads found on edaboard.com: Diode For Battery
Hi all, I've created a circuit that switches individual items of avionics (for my glider) between two 12V batteries with a common ground. The idea is that I can switch items between battery A or B depending on how the batteries (and my power requirements) hold up over the course of a flight. There are five individual instruments. In total the
minimum voltage of li battery is 3.3v I need to replace 2 AA size battery so I need 3v output. Put a silicon diode in series with the battery. It will drop 0.7 volts. How much current does the load draw? The diode you select depends on this.
PWM's are driven through mosfet driver. What kind of MOSFET driver? Bootstrap drivers like IR2110 don't work for this circuit without special provisions. As from figure, if G1>G2, PWM1 is on with 12.5% duty cycle Means the inductor current is commutating through MOSFET body diode with respective losses? But I gues
Hi, there is no need for buck-boost. Either use buck or use boost, depending on your power supply voltage. *** But itīs not that simple as your picture. You need an inductance...and a diode at the power path. and some controlling system... Klaus
Hi, Ive got 2 batteries 11v and 7v, one goes to motor and the other feeds the logic on a motor shield and an Arduino. Both batteries go through a DPDT switch, so there is no permanent connection to the batteries (the switch cuts the +ve) to allow regeneration charge to flow back to the battery. I've been told to put a power diode in series with the
I thought about complete parameters... e.g. M, f, RL, IGBT and diode specification.
The load will start to draw current from the battery if the PMOSFET voltage drop exceeds the substrate diode forward voltage, e.g. 0.7 V.
Hi, I need an assistance to chose the right diode values for protecting the circuite from reverse voltage and current protection. vin 12v, max forward current /consumption of the circuit can reach 7A. do i need to choose a 7A max forward current? can anyone specify example models? is it better to use a schottky (...)
A zener diode won't do it. You need a comparator IC and a voltage reference (maybe a zener diode). You could do it with an LM10 (8-pins IC) and a few resistors since the LM10 has an opamp that can be used as a comparator and it also has an adjustable voltage reference.
i agree this charger is using the battery for energy storage to the battery will see large low frequency ripple. also this means it is a single-stage PFC topology which means it is not using the entire power cycle to make correction but rather just the diode conduction period. its normal for single stage (...)
You never connect a forward biased diode across a battery because the current will be unlimited and damage the diode and the battery. Why are you worrying about the extremely small current of a reverse biased diode that you probably cannot measure? forward biased= (...)
You could put a Silicon power diode across the #1 switch to supply current if the coin cell drops below 3.6 and charger happens to be on.
This injects 187.5mV of hysteresis above the 3.00V shutdown to enable it. You probably want 300mV of hysteresis above a shutdown of 11.5V with a drop of <100mV on the switch or < 100mOhms RdsOn. for precision any bandgap reference will do. Even 2V LED @1mA will do or a 1 cent silicon diode with 1mA at 600mV for a reference may do with (...)
It depends on your power budget for conduction loss on diode vs dynamic loss during recovery. Often dynamic losses exceed conduction losses forcing designers with 100kW SMPS to use very expensive HV low Trr parts to get 98% efficiency.
The problem with active FET input is ESD prone to failure and low capacitance diode caps add noise. This why RF transformers were used on front ends for wide band reception over 2 decades. Loop antenna shunts ESD risks but picks up stray leakage currents in band from triacs or FL ballasts or other H field noise. That being said I used FET (...)
How about using ORing diodes? Frank
Hi, I am trying to use a TP4056 based CC-CV Li battery charger (along with battery) to make a lamp that automatically switches between AC and battery. I choose the TP4056 CC/CV charger because its small, gives upto 850mA of current and seems to be fairly reliable one. The LEDs that I will use will be 0.5W ones which don't need heatsink. I (...)
A low voltage zener diode is a poor voltage regulator because its voltage changes with load current and with temperature changes. A zener diode wastes battery current all the time. Instead you should use a low dropout linear voltage regulator IC. The one I use is not made anymore but I still have some to use for my (...)
Circuit is polarity protection of load connected on +12 point. Zener diode, resistors and transistor limits Vgs. Circuit can be a part of battery supply.
for bi-directional current flow. You use them generally as a load switch and it allows very low conduction losses in either direction when on. Then when you turn it off, it blocks in both directions, as you have the inherent drain-source body diode back to back. Otherwise called a bat fet for battery fet, as you find them as (...)